I doubt anyone would really want to do any crossing over with this series. ;)
Methos: What? Hold on. All the other Immortals have fantastic clairvoyant powers and psychic abilities, as well as clearly impossible kinetic abilities stemming from total abuse of Eistein's theories and utter junking of quantum mechanics? And I just get to live forever. As long as no one decapitates me?
Methos: When were you going to mention that?
Joe: (shrugs) It was in the chronicles. I thought you knew.